Over the past week, the world of Mixed Martial Arts has been rocked to its core by the revelation that Anderson Silva, widely recognized as the greatest Martial Artist in history, had tested positive for Drostanolone and Adrostane metabolites before his fight with Nick Diaz. Assuming Silva's test result is correct, why would an athlete of his stature take such a stupid risk?

News broke this week that Cung Le, a Kung Fu action star and perhaps the most famous Sanshou fighter of all time, tested positive for excessive levels Human Growth Hormone following his August UFC loss to Michael Bisping. If supposedly noble Martial Artists are cheating, what does this say about professional sports in general?